Figure 12-21 Installing a BBU alarm cable
Step 2 Route the cable by referring to 12.4.1 Cabling Requirements, and then use cable ties to bind
the cable.
Step 3 Label the installed cables. For details, see Attaching an L-Shaped Label.
----End
12.4.7 Installing a CPRI Optical Cable
A CPRI optical cable transmits CPRI signals between a BBU and an RRU.
Context
l The single-mode optical module is labeled "SM" and multi-mode optical module is labeled
"MM".
l If the puller of an optical module is blue, the module is a single-mode optical module. If
the puller of an optical module is black or grey, the module is a multi-mode optical module.
l The optical module to be installed must have a matching rate with the corresponding CPRI
port.
CAUTION
The performance of an optical module that is exposed to the air for more than 20 minutes may
be abnormal. Therefore, you must insert an fiber optic cable into an unpacked optical module
within 20 minutes.
Procedure
Step 1 Install an optical module, as shown in Figure 12-22.
1. Turn the puller on the optical module outwards.
DBS3900 (Ver.B)
Installation Guide
12 Indoor Scenario with DC Power Supply (BBU Installed in
a 19-Inch Rack)
Issue 06 (2011-09-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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